1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.messaging.ui; 17 18 import android.content.Context; 19 import androidx.viewpager.widget.PagerAdapter; 20 import androidx.viewpager.widget.ViewPager; 21 import androidx.viewpager.widget.ViewPager.OnPageChangeListener; 22 import android.util.AttributeSet; 23 import android.util.TypedValue; 24 import android.view.LayoutInflater; 25 import android.widget.LinearLayout; 26 27 import com.android.messaging.R; 28 import com.android.messaging.util.Assert; 29 30 /** 31 * A view that contains both a view pager and a tab strip wrapped in a linear layout. 32 */ 33 public class CustomHeaderViewPager extends LinearLayout { 34 public final static int DEFAULT_TAB_STRIP_SIZE = -1; 35 private final int mDefaultTabStripSize; 36 private ViewPager mViewPager; 37 private ViewPagerTabs mTabstrip; 38 CustomHeaderViewPager(final Context context, final AttributeSet attrs)39 public CustomHeaderViewPager(final Context context, final AttributeSet attrs) { 40 super(context, attrs); 41 42 final LayoutInflater inflater = LayoutInflater.from(context); 43 inflater.inflate(R.layout.custom_header_view_pager, this, true); 44 setOrientation(LinearLayout.VERTICAL); 45 46 mTabstrip = (ViewPagerTabs) findViewById(R.id.tab_strip); 47 mViewPager = (ViewPager) findViewById(R.id.pager); 48 49 TypedValue tv = new TypedValue(); 50 context.getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true); 51 mDefaultTabStripSize = context.getResources().getDimensionPixelSize(tv.resourceId); 52 } 53 setCurrentItem(final int position)54 public void setCurrentItem(final int position) { 55 mViewPager.setCurrentItem(position); 56 } 57 setViewPagerTabHeight(final int tabHeight)58 public void setViewPagerTabHeight(final int tabHeight) { 59 mTabstrip.getLayoutParams().height = tabHeight == DEFAULT_TAB_STRIP_SIZE ? 60 mDefaultTabStripSize : tabHeight; 61 } 62 setViewHolders(final CustomHeaderPagerViewHolder[] viewHolders)63 public void setViewHolders(final CustomHeaderPagerViewHolder[] viewHolders) { 64 Assert.notNull(mViewPager); 65 final PagerAdapter adapter = new CustomHeaderViewPagerAdapter(viewHolders); 66 mViewPager.setAdapter(adapter); 67 mTabstrip.setViewPager(mViewPager); 68 mViewPager.setOnPageChangeListener(new OnPageChangeListener() { 69 70 @Override 71 public void onPageScrollStateChanged(int state) { 72 mTabstrip.onPageScrollStateChanged(state); 73 } 74 75 @Override 76 public void onPageScrolled(int position, float positionOffset, 77 int positionOffsetPixels) { 78 mTabstrip.onPageScrolled(position, positionOffset, positionOffsetPixels); 79 } 80 81 @Override 82 public void onPageSelected(int position) { 83 mTabstrip.onPageSelected(position); 84 } 85 }); 86 } 87 getSelectedItemPosition()88 public int getSelectedItemPosition() { 89 return mTabstrip.getSelectedItemPosition(); 90 } 91 } 92